State v. Maas — affirmed a deliberate-homicide conviction despite confrontation and juvenile-evidence errors

Case
State of Montana v. Zackary Matthew Maas
Court
Montana Supreme Court
Judge
Cory J. Swanson (elected 2024)
Date Decided
September 15, 2026
Docket No.
DA 23-0273
Topics
Confrontation Clause; Harmless Error; Justifiable Use of Force; Character Evidence
Source
Read the full opinion

Background

Zackary Matthew Maas entered Gabriel Wagoner’s basement apartment during the early morning while armed, confronted him about allegedly stolen property, and shot him in the back as the men moved up a narrow staircase. Wagoner initially survived but died about a month later from complications of the gunshot wound. Maas admitted shooting Wagoner but claimed he acted to protect Jerum Auclaire from an imminent baseball-bat attack.

A jury convicted Maas of deliberate homicide, and the District Court sentenced him to 80 years in prison with no time suspended. On appeal, Maas challenged the admission of statements Wagoner made before his death and the State’s cross-examination about an incident in which Maas, as a child, shot a jogging woman in the head with a BB gun.

The Court’s Holding

The Montana Supreme Court affirmed. It held that Wagoner’s statements at the scene, in the ambulance, and at the local hospital were nontestimonial because they were made during an ongoing emergency while the shooter remained at large. Wagoner’s later statements to his brothers also were nontestimonial because they were personal conversations with family members during a medical crisis, not substitutes for trial testimony.

The Court held, however, that Wagoner’s later telephone statements to investigating Detective Webster from the Seattle hospital were testimonial because Maas had been arrested, the emergency had ended, and the statements resembled testimony that the State would have elicited at trial. Their admission violated the Confrontation Clause, but the majority found the error harmless because nearly all the account was cumulative and the sole noncumulative detail—that Wagoner was walking up the stairs—had minimal qualitative impact in light of the admissible evidence.

The Court also held that Maas opened the door to tailored character rebuttal by volunteering that he was not a fighter and was kindhearted, but that the District Court abused its discretion by admitting the remote BB-gun incident from Maas’s childhood. The incident had little probative value regarding his adult character and carried unfair prejudice. That error was harmless, the Court concluded, given Maas’s threats, armed entry, conduct during the confrontation, and other evidence undermining his justification defense.

Key Takeaways

  • A victim’s statements to police are nontestimonial when, viewed objectively, their primary purpose is addressing an ongoing emergency, including locating an armed suspect who remains at large.
  • Statements to family members do not become testimonial merely because a relative works in law enforcement when the conversation is personal and unrelated to that employment.
  • A defendant may open the door to character rebuttal through self-serving testimony, but the rebuttal must remain relevant and survive unfair-prejudice review; remote juvenile misconduct may be too weakly connected to adult character.

Why It Matters

The decision applies the primary-purpose test statement by statement, emphasizing that the same victim’s accounts may shift from nontestimonial to testimonial as an emergency ends and a criminal investigation becomes the dominant purpose. It also reinforces that a Confrontation Clause violation does not automatically require reversal when the State proves the improperly admitted evidence could not reasonably have contributed to the conviction.

Justice Katherine M. Bidegaray concurred that the Harborview statement and BB-gun evidence were improperly admitted but dissented from the affirmance. She concluded that the victim’s statement that he was walking supplied a unique account of the critical moment and that the State failed to prove the constitutional error harmless beyond a reasonable doubt.

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